Saw feeding apparatus



" May 6,1941. A. A. KVALHEIM s vg FEEDING APPARATUS Filed Sept. 16, 1940xI I l l I I I I I! .U

7. J2 Evalkez'm IN VEN TOR.

A TTORNEY S.

Patente d May 6, 1941 UNITED STATES PATENT OFFICE saw resume. arraaarusa, mm a. Kvalheim, Petalurna, Calif. Application September 16, 1940,Serial No. 351.044

(CL-14H 4 Claims.

This invention relates to saw feeding apparatus and is designedprimarily as a means whereby a circular saw can be moved forwardly orbackwardlyas desired and relative to thework by means of a simple butemcient mecha nism under constant. control of the operator, and

without interfering with the rotation of the saw.

A further object is to provide a means by 1 which the shaft of the sawcan be utilized as a feeding element for shifting the saw into or out ofposition.

With the foregoing and other objects in view which will appear as thedescription proceeds, .the invention-consists. ofcertain novel detailsof 1 construction and combinations ofparts hereinafter more fullydescribed and pointed out in the claims, it being understood thatchanges may be .made in the construction and arrangement of partswithout departing from the spirit of the invention as claimed.

In the drawing, which is a plan view of the apparatus, the preferredform of the invention has been shown.

Referring to the drawing by characters of ref- "erence, I designates asuitable supporting frame provided with guide rails I. A carriage I ismounted for movement within the frame and has the cable It will be drawntaut while additional slack will be supplied to the cable II. As aresult of this action the convolutions II will be tightened on the shaftI and said shaft will therefore be caused to wind cable I! therearoundso that the carriage will be moved toward the fixed end ll of the cable.By shifting the crosshead to its other extreme position, however, the

convolutions. i! will be loosened and cable It rendered slack whilecable I! will be drawn taut and its convolutions willbe tightened. As aresult, continued rotation of the shaft I in the direction indicated bythe arrow will result in the transverse axles 4 on which aremountedwheels I adapted to travel along the rails so that the carriage will beproperly guided.

Bearings 8 are mounted on. the carriage and iournalled therein is ashaft I of a circular saw This shaft has one or more pulleys I wherebymotion may be transmitted thereto through one or more belts II from thepulleys H of a motor II, the motor being connected to and movable withthe carriage and, in the structure illustrated, being suspendedtherefrom.

A cross-head I3 is plvotallymounteei between its ends on frame I asindicated at H and, in the structure illustrated, has an arm or handleII extending therefrom. To the respective'ends of .this cross-head areattached'cables l8 and II the opposite ends of which arefastenedsecurely to the frame as shown at It; Cable I8 is wrapped carriage 8being moved toward the cross-head due to the fact that cable 81 willbewound on the shaft .1. Thus by manipulating handle II and cross-head l8,themovement of the carriage 3 in either direction can be controlledreadily. Obviously as the carriage is moved,,the saw and the motor willalso be moved therewith.

What is claimed is i 1. The combination with a movable carriage,

and a frame for supporting and guiding theisame. of a shaft journalledon the carriage, a circular saw carried by the shaft, cables anchored atone end to the frame and wrapped in opposite directions respectivelyabout the shaft, and means on the frame and connected to the cables forplacing either of said cables under tension.

2. The combination with a movable carriage,

and a frame for supporting and guiding the tension, said means includinga pivoted crossin one direction about the shaft 1 while cable ll iswrapped in the opposite direction.

Under normal conditions the cables are slack so that the shaft 1 canrevolve freely within the convolutions II and 20 forming parts of therespective cables.

Assuming that the'shaft 1 is rotating m the I direction indicated bythearrow, it will be obvious that when the cross-head I3 is shifted tothe position indicated by broken lines in the drawing,

ing the cross-head' same, of a shaft journalled on the carriage, acircular saw carried by the shaft, cables anchored at one end to theframe and' wrapped in opposite directions respectively about the shaft,and means on the frame and connected to the cables for placing either ofsaid cables under other ends of the respective cables, and means forswinging the cross-head on its pivot for tightening either of the cablesabout the shaft.

4. The combination with a structure havin guides, and a carriage mountedfor back and forth sliding movement relative to the frame and to theother ends of the respective cables, and means for shifting thecross-head to tighten either of the wrapped portions of the cablesthereby to move the carriage in either direction 5 relative to thestructure.

\ ANANIAS A. KVALHEIM.

